Email Delivery is one of the most important topics in Email marketing, and it is calculated by taking the total number of emails that you have sent and then deducting the ones that bounced or were rejected. In other words, this is the number of emails that actually appeared in your subscribers’ inboxes compared to the number that you’ve sent.

Email Deliverability refers to the ability of any given email to be delivered properly. It’s about ensuring bulk messages are delivered to the inbox and aren’t blocked or rerouted by spam filters. Neglecting email deliverability is a surefire way to worsen the any campaign issues you might already be having, because these messages could equally end up in the inbox, in someone’s junk folder, or be blocked by spam filters. People often mistake the terms such as email deliverability and email delivery, using them interchangeably, when in fact they are two are extremely different. This tends to cause some confusion when people analyze emailing reports, which means some users may not even be figuring their success rates correctly.